English

supralateral

From supra- + lateral.

Proto-Indo-European *úp

…

Proto-Italic *superos ‘upper’

Proto-Italic *superād ‘above’

Old Latin suprād

Latin suprā ‘above, on the top, on the upper side’

Latin latus ‘the side or flank’

Latin laterālis ‘belonging to the side’

Today it means

adj Placed on the upper part of the side.

Language periods are conventional ranges, not dates for this word.

Etymograph / supralateral